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Finding the Third Proportional to 18,438 and 39,948

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Solution

The third proportional to 18,438 and 39,948 is: 86,551.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438 : 39,948 = 39,948 : x
  2. Step 2: Convert to fraction form
    18,438/39,948 = 39,948/x
  3. Step 3: Cross multiply
    18,438x = 39,948 × 39,948
  4. Step 4: Simplify right side
    18,438x = 1,595,842,704
  5. Step 5: Solve for x
    x = 1,595,842,704/18,438
  6. Step 6: Final answer
    x = 86,551.83

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.